Answer
$(8x-9)(8x+9)$
Work Step by Step
The given expression can be written as
$(8x)^2-9^2.$
The expression above is a difference of two squares.
RECALL:
$a^2-b^2=(a-b)(a+b).$
Factor the difference of two squares using the formula above to obtain
$(8x-9)(8x+9).$
